# File lib/fileutils.rb, line 141def uptodate?(new,old_list,options=nil)raiseArgumentError,'uptodate? does not accept any option'ifoptionsreturnfalseunlessFile.exist?(new)new_time=File.mtime(new)old_list.eachdo|old|ifFile.exist?(old)returnfalseunlessnew_time>File.mtime(old)endendtrueend